Verifying an Identity Based on Multiple Distributed Data Sources Using a Blockchain to Safeguard the Identity

1. A system comprising: a processing device; a communications network port configured for being controlled by the processing device; and a memory device on which are stored instructions that are executable by the processing device to: access a blockchain that represents an online identity of an entity, the blockchain having a block that includes data indicating a request for a token for authenticating an online entity; generate the token based on one or more ordered blocks in the blockchain, wherein the one or more ordered blocks include encoded data from one or more identity sources that represent personally identifiable information of the entity; transmit, via the communications network port, the token to the entity, wherein the online identity of the entity is verifiable to an online service via the token; decode, based on the token, the one or more identity sources from the encoded data in the blockchain; and transmit, via the communications network port, the one or more identity sources to the online service for processing the one or more identity sources.

2. The system of claim 1 , wherein the instructions that are executable by the processing device to generate the token are further executable by the processing device to: determine a first hash value for the blockchain based on the one or more ordered blocks in the blockchain; generate the token based on the first hash value such that the token is associated with the blockchain; receive, via the communications network port, the token from the online service; and transmit, via the communications network port and based on receiving the token from the online service, a confirmation of the online identity of the entity to the online service, wherein the instructions that are executable by the processing device to transmit the confirmation of the online identity of the entity are executable by the processing device to: determine a current hash value for the blockchain based on the one or more ordered blocks in the blockchain in response to receiving the token; transmit, via the communications network port, the confirmation of the online identity of the entity while preventing the online identity from accessing the one or more identity sources in response to determining that the first hash value matches the current hash value; and store an authentication event as another new block in the blockchain such that the current hash value of the blockchain is modified.

3. The system of claim 1 , wherein the blockchain is a first blockchain, and wherein the instructions are further executable by the processing device to: verify, based on the token, an identity of the online service based on a second blockchain that represents the online identity of the online service; verify that the token was requested by the entity for authenticating the online identity of the entity to the online service; and transmit, via the communications network port and based on receiving the token from the online service, a confirmation of the online identity of the entity to the online service.

4. The system of claim 1 , wherein the instructions are further executable by the processing device to: receive, via the communications network port, the one or more identity sources; store the one or more identity sources in a private database; and generate the blockchain representing the online identity of the entity by generating an ordered block based on each identity source of the one or more identity sources.

5. The system of claim 4 , wherein the instructions are further executable by the processing device to: determine, based on the token, a particular identity source of the one or more identity sources from the private database, wherein transmitting the one or more identity sources to the online service includes transmitting the particular identity source to the online service for processing the particular identity source.

6. The system of claim 1 , wherein the instructions are further executable by the processing device to: receive, via the communications network port, a correction to the one or more identity sources; and store the correction in another new block in the blockchain such that a hash value based on the blockchain is modified.

7. A non-transitory computer-readable medium in which instructions executable by a processing device are stored for causing the processing device to: access a blockchain that represents an online identity of an entity, the blockchain having a block that includes data indicating a request for a token for authenticating an online entity; generate the token based on one or more ordered blocks in the blockchain, wherein the one or more ordered blocks include encoded data from one or more identity sources that represent personally identifiable information of the entity; transmit, via a communications network port configured for being controlled by the processing device, the token to the entity, wherein the online identity of the entity is verifiable to an online service via the token; decode, based on the token, the one or more identity sources from the encoded data in the blockchain; and transmit, via the communications network port, the one or more identity sources to the online service for processing the one or more identity sources.

8. The non-transitory computer-readable medium of claim 7 , wherein the instructions executable by the processing device to generate the token are further executable by the processing device to: determine a first hash value for the blockchain based on the one or more ordered blocks in the blockchain; generate the token based on the first hash value such that the token is associated with the blockchain; receive, via the communications network port, the token from the online service; and transmit, via the communications network port and based on receiving the token from the online service, a confirmation of the online identity of the entity to the online service.

9. The non-transitory computer-readable medium of claim 8 , wherein the instructions that are executable by the processing device to transmit the confirmation of the online identity of the entity are executable by the processing device to: determine a current hash value for the blockchain based on the one or more ordered blocks in the blockchain in response to receiving the token; transmit, via the communications network port, the confirmation of the online identity of the entity while preventing the online identity from accessing the one or more identity sources in response to determining that the first hash value matches the current hash value; and store an authentication event as another new block in the blockchain such that the current hash value of the blockchain is modified.

10. The non-transitory computer-readable medium of claim 7 , wherein the blockchain is a first blockchain, and wherein the instructions are further executable by the processing device to: verify, based on the token, an identity of the online service based on a second blockchain that represents the online identity of the online service; verify that the token was requested by the entity for authenticating the online identity of the entity to the online service; and transmit, via the communications network port and based on receiving the token from the online service, a confirmation of the online identity of the entity to the online service.

11. The non-transitory computer-readable medium of claim 7 , wherein the instructions are further executable by the processing device to: receive, via the communications network port, the one or more identity sources; store the one or more identity sources in a private database; determine, based on the token, a particular identity source of the one or more identity sources from the private database, wherein causing the processing device to transmit the one or more identity sources to the online service includes transmitting the particular identity source to the online service for processing the particular identity source; and generate the blockchain representing the online identity of the entity by generating an ordered block based on each identity source of the one or more identity sources.

12. The non-transitory computer-readable medium of claim 7 , wherein the instructions are further executable by the processing device to: receive, via the communications network port, a correction to the one or more identity sources that represent personally identifiable information of the entity; and store the correction in another new block in the blockchain such that a hash value based on the blockchain is modified.

13. A method comprising: accessing, by a processing device, a blockchain that represents an online identity of an entity, the blockchain having a block that includes data indicating a request for a token for authenticating an online entity; generating, by the processing device, the token based on one or more ordered blocks in the blockchain, wherein the one or more ordered blocks include encoded data from one or more identity sources that represent personally identifiable information of the entity; transmitting, via a communications network port configured for being controlled by the processing device, the token to the entity, wherein the online identity of the entity is verifiable to an online service via the token; decoding, based on the token, the one or more identity sources from the encoded data in the blockchain; and transmitting, via the communications network port, the one or more identity sources to the online service for processing the one or more identity sources.

14. The method of claim 13 , wherein generating the token further comprises: determining a first hash value for the blockchain based on the one or more ordered blocks in the blockchain; generating the token based on the first hash value such that the token is associated with the blockchain; receiving, via the communications network port, the token from the online service; and transmitting, via the communications network port and based on receiving the token from the online service, a confirmation of the online identity of the entity to the online service.

15. The method of claim 14 , wherein transmitting the confirmation of the online identity of the entity further comprises: determine a current hash value for the blockchain based on the one or more ordered blocks in the blockchain in response to receiving the token; transmit, via the communications network port, the confirmation of the online identity of the entity while preventing the online identity from accessing the one or more identity sources in response to determining that the first hash value matches the current hash value; and store an authentication event as another new block in the blockchain such that the current hash value of the blockchain is modified.

16. The method of claim 13 , wherein the blockchain is a first blockchain, and wherein the method further comprises: verifying, based on the token, an identity of the online service based on a second blockchain that represents the online identity of the online service; verifying that the token was requested by the entity for authenticating the online identity of the entity to the online service; and transmitting, via the communications network port and based on receiving the token from the online service, a confirmation of the online identity of the entity to the online service.

17. The method of claim 13 , further comprising: receiving, via the communications network port, the one or more identity sources; storing the one or more identity sources in a private database; determining, based on the token, a particular identity source of the one or more identity sources from the private database; wherein transmitting the one or more identity sources to the online service includes transmitting the particular identity source to the online service for processing the particular identity source; and generating the blockchain representing the online identity associated with the entity by generating an ordered block based on each identity source of the one or more identity sources.